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boinc/client/file_xfer.cpp

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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2008 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
#include "cpp.h"
#ifdef _WIN32
#include "boinc_win.h"
#else
#include "config.h"
#endif
#include "util.h"
#include "file_names.h"
#include "client_state.h"
#include "filesys.h"
#include "client_msgs.h"
#include "file_xfer.h"
#include "parse.h"
#include "error_numbers.h"
using std::vector;
FILE_XFER::FILE_XFER() {
file_xfer_done = false;
file_xfer_retval = 0;
fip = NULL;
strcpy(pathname, "");
strcpy(header, "");
file_size_query = false;
}
FILE_XFER::~FILE_XFER() {
if (fip && fip->pers_file_xfer) {
fip->pers_file_xfer->fxp = NULL;
}
}
int FILE_XFER::init_download(FILE_INFO& file_info) {
is_upload = false;
fip = &file_info;
get_pathname(fip, pathname, sizeof(pathname));
// if file is already as large or larger than it's supposed to be,
// something's screwy; start reading it from the beginning.
//
if (file_size(pathname, starting_size) || starting_size >= fip->nbytes) {
starting_size = 0;
}
bytes_xferred = starting_size;
const char* url = fip->get_current_url(is_upload);
if (!url) return ERR_INVALID_URL;
return HTTP_OP::init_get(
url, pathname, false, (int)starting_size
);
}
// for uploads, we need to build a header with xml_signature etc.
// (see doc/upload.php)
// Do this in memory.
//
int FILE_XFER::init_upload(FILE_INFO& file_info) {
// If upload_offset < 0, we need to query the upload handler
// for the offset information
// TODO: give priority to unfinished upload if there are multiple choices
//
fip = &file_info;
get_pathname(fip, pathname, sizeof(pathname));
is_upload = true;
if (file_info.upload_offset < 0) {
bytes_xferred = 0;
sprintf(header,
"<data_server_request>\n"
" <core_client_major_version>%d</core_client_major_version>\n"
" <core_client_minor_version>%d</core_client_minor_version>\n"
" <core_client_release>%d</core_client_release>\n"
" <get_file_size>%s</get_file_size>\n"
"</data_server_request>\n",
BOINC_MAJOR_VERSION, BOINC_MINOR_VERSION, BOINC_RELEASE,
file_info.name
);
file_size_query = true;
const char* url = fip->get_current_url(is_upload);
if (!url) return ERR_INVALID_URL;
return HTTP_OP::init_post2(url, header, sizeof(header), NULL, 0);
} else {
bytes_xferred = file_info.upload_offset;
sprintf(header,
"<data_server_request>\n"
" <core_client_major_version>%d</core_client_major_version>\n"
" <core_client_minor_version>%d</core_client_minor_version>\n"
" <core_client_release>%d</core_client_release>\n"
"<file_upload>\n"
"<file_info>\n"
"%s"
"<xml_signature>\n"
"%s"
"</xml_signature>\n"
"</file_info>\n"
"<nbytes>%.0f</nbytes>\n"
"<md5_cksum>%s</md5_cksum>\n"
"<offset>%.0f</offset>\n"
"<data>\n",
BOINC_MAJOR_VERSION, BOINC_MINOR_VERSION, BOINC_RELEASE,
file_info.signed_xml,
file_info.xml_signature,
file_info.nbytes,
file_info.md5_cksum,
file_info.upload_offset
);
file_size_query = false;
const char* url = fip->get_current_url(is_upload);
if (!url) return ERR_INVALID_URL;
return HTTP_OP::init_post2(
url , header, sizeof(header), pathname, fip->upload_offset
);
}
}
// Parse the file upload handler response in req1
//
int FILE_XFER::parse_upload_response(double &nbytes) {
int status = ERR_UPLOAD_TRANSIENT, x;
char buf[256];
nbytes = -1;
parse_double(req1, "<file_size>", nbytes);
if (parse_int(req1, "<status>", x)) {
switch (x) {
case -1: status = ERR_UPLOAD_PERMANENT; break;
case 0: status = 0; break;
case 1: status = ERR_UPLOAD_TRANSIENT; break;
default: status = ERR_UPLOAD_TRANSIENT; break;
}
} else {
status = ERR_UPLOAD_TRANSIENT;
}
if (parse_str(req1, "<message>", buf, sizeof(buf))) {
msg_printf(fip->project, MSG_INTERNAL_ERROR,
"Error reported by file upload server: %s", buf
);
}
if (log_flags.file_xfer_debug) {
msg_printf(fip->project, MSG_INFO,
"[file_xfer_debug] parsing upload response: %s", req1
);
msg_printf(fip->project, MSG_INFO,
"[file_xfer_debug] parsing status: %d", status
);
}
return status;
}
// Create a new empty FILE_XFER_SET
//
FILE_XFER_SET::FILE_XFER_SET(HTTP_OP_SET* p) {
http_ops = p;
up_active = false;
down_active = false;
}
// start a FILE_XFER going (connect to server etc.)
// If successful, add to the set
//
int FILE_XFER_SET::insert(FILE_XFER* fxp) {
int retval;
retval = http_ops->insert(fxp);
if (retval) return retval;
file_xfers.push_back(fxp);
set_bandwidth_limits(fxp->is_upload);
return 0;
}
// Remove a FILE_XFER object from the set
//
int FILE_XFER_SET::remove(FILE_XFER* fxp) {
vector<FILE_XFER*>::iterator iter;
http_ops->remove(fxp);
iter = file_xfers.begin();
while (iter != file_xfers.end()) {
if (*iter == fxp) {
iter = file_xfers.erase(iter);
set_bandwidth_limits(fxp->is_upload);
return 0;
}
iter++;
}
msg_printf(NULL, MSG_INTERNAL_ERROR,
"File transfer for %s not found", fxp->fip->name
);
return ERR_NOT_FOUND;
}
// Run through the FILE_XFER_SET and determine if any of the file
// transfers are complete or had an error
//
bool FILE_XFER_SET::poll() {
unsigned int i;
FILE_XFER* fxp;
bool action = false;
static double last_time=0;
char pathname[256];
double size;
if (gstate.now - last_time < 1.0) return false;
last_time = gstate.now;
for (i=0; i<file_xfers.size(); i++) {
fxp = file_xfers[i];
if (!fxp->http_op_done()) continue;
action = true;
fxp->file_xfer_done = true;
if (log_flags.file_xfer_debug) {
msg_printf(0, MSG_INFO,
"[file_xfer_debug] FILE_XFER_SET::poll(): http op done; retval %d\n",
fxp->http_op_retval
);
}
fxp->file_xfer_retval = fxp->http_op_retval;
if (fxp->file_xfer_retval == 0) {
if (fxp->is_upload) {
fxp->file_xfer_retval = fxp->parse_upload_response(
fxp->fip->upload_offset
);
}
// If this was a file size query, restart the transfer
// using the remote file size information
//
if (fxp->file_size_query) {
if (fxp->file_xfer_retval) {
fxp->fip->upload_offset = -1;
} else {
// if the server's file size is bigger than ours,
// something bad has happened
// (like a result got sent to multiple users).
// Pretend the file was successfully uploaded
//
if (fxp->fip->upload_offset >= fxp->fip->nbytes) {
fxp->file_xfer_done = true;
fxp->file_xfer_retval = 0;
} else {
// Restart the upload, using the newly obtained
// upload_offset
//
fxp->close_socket();
fxp->file_xfer_retval = fxp->init_upload(*fxp->fip);
if (!fxp->file_xfer_retval) {
remove(fxp);
i--;
fxp->file_xfer_retval = insert(fxp);
if (!fxp->file_xfer_retval) {
fxp->file_xfer_done = false;
fxp->file_xfer_retval = 0;
fxp->http_op_retval = 0;
}
}
}
}
}
} else if (fxp->file_xfer_retval == HTTP_STATUS_RANGE_REQUEST_ERROR) {
fxp->fip->error_msg = "Local copy is at least as large as server copy";
}
// deal with various error cases for downloads
//
if (!fxp->is_upload) {
get_pathname(fxp->fip, pathname, sizeof(pathname));
if (file_size(pathname, size)) continue;
double diff = size - fxp->starting_size;
if (fxp->http_op_retval == 0) {
// If no HTTP error,
// see if we read less than 5 KB and file is incomplete.
// If so truncate the amount read,
// since it may be a proxy error message
//
if (fxp->fip->nbytes) {
if (size == fxp->fip->nbytes) continue;
if (diff>0 && diff<MIN_DOWNLOAD_INCREMENT) {
msg_printf(fxp->fip->project, MSG_INFO,
"Incomplete read of %f < 5KB for %s - truncating",
diff, fxp->fip->name
);
boinc_truncate(pathname, fxp->starting_size);
}
}
} else {
// got HTTP error; truncate last 5KB of file, since some
// error-reporting HTML may have been appended
//
if (diff < MIN_DOWNLOAD_INCREMENT) {
diff = 0;
} else {
diff -= MIN_DOWNLOAD_INCREMENT;
}
boinc_truncate(pathname, fxp->starting_size + diff);
}
}
// for downloads: if we requested a partial transfer,
// and the HTTP response is 200,
// and the file is larger than it should be,
// the server or proxy must have sent us the entire file
// (i.e. it doesn't understand Range: requests).
// In this case, trim off the initial part of the file
//
if (!fxp->is_upload && fxp->starting_size
&& fxp->response==HTTP_STATUS_OK
) {
get_pathname(fxp->fip, pathname, sizeof(pathname));
if (file_size(pathname, size)) continue;
if (size > fxp->fip->nbytes) {
FILE* f1 = boinc_fopen(pathname, "rb");
if (!f1) {
fxp->file_xfer_retval = ERR_FOPEN;
msg_printf(fxp->fip->project, MSG_INTERNAL_ERROR,
"File size mismatch, can't open %s", pathname
);
continue;
}
FILE* f2 = boinc_fopen(TEMP_FILE_NAME, "wb");
if (!f2) {
msg_printf(fxp->fip->project, MSG_INTERNAL_ERROR,
"File size mismatch, can't open temp %s", TEMP_FILE_NAME
);
fxp->file_xfer_retval = ERR_FOPEN;
fclose(f1);
continue;
}
fseek(f1, (long)fxp->starting_size, SEEK_SET);
copy_stream(f1, f2);
fclose(f1);
fclose(f2);
f1 = boinc_fopen(TEMP_FILE_NAME, "rb");
f2 = boinc_fopen(pathname, "wb");
copy_stream(f1, f2);
fclose(f1);
fclose(f2);
}
}
}
return action;
}
// return true if an upload is currently in progress
// or has been since the last call to this.
// Similar for download.
//
void FILE_XFER_SET::check_active(bool& up, bool& down) {
unsigned int i;
FILE_XFER* fxp;
up = up_active;
down = down_active;
for (i=0; i<file_xfers.size(); i++) {
fxp = file_xfers[i];
fxp->is_upload?up=true:down=true;
}
up_active = false;
down_active = false;
}
// adjust bandwidth limits
//
void FILE_XFER_SET::set_bandwidth_limits(bool is_upload) {
double max_bytes_sec;
unsigned int i;
FILE_XFER* fxp;
if (is_upload) {
max_bytes_sec = gstate.global_prefs.max_bytes_sec_up;
} else {
max_bytes_sec = gstate.global_prefs.max_bytes_sec_down;
}
if (!max_bytes_sec) return;
int n = 0;
for (i=0; i<file_xfers.size(); i++) {
fxp = file_xfers[i];
if (!fxp->is_active()) continue;
if (is_upload) {
if (!fxp->is_upload) continue;
} else {
if (fxp->is_upload) continue;
}
n++;
}
if (!n) return;
max_bytes_sec /= n;
for (i=0; i<file_xfers.size(); i++) {
fxp = file_xfers[i];
if (!fxp->is_active()) continue;
if (is_upload) {
if (!fxp->is_upload) continue;
fxp->set_speed_limit(true, max_bytes_sec);
} else {
if (fxp->is_upload) continue;
fxp->set_speed_limit(false, max_bytes_sec);
}
}
}
const char *BOINC_RCSID_31ba21bea3 = "$Id$";
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